Method and apparatus for recording data on a magnetic recording medium

Abstract

A method for recording data on a magnetic recording medium is disclosed. When data are written to a target track Tn, the numbers of effects on tracks Tn−1 and Tn+1 adjacent to a target track are counted as Adjacent Track Interference (ATI) effect counts Cn−1 and Cn+1, respectively, to determine whether or not the ATI effect counts Cn−1 and Cn+1 are greater than a permissible ATI count Np. If the ATI effect counts Cn−1 and Cn+1 are greater than the permissible ATI count Np, ATI error preventive processing is performed on the tracks Tn−1 and Tn+1. All sectors on the Tn−1 and Tn+1 are determined as to whether or not they are affected by ATI, and ATI error counter-measure processing is performed on all affected sectors to recover data.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]The present application claims benefit of priority under 35 U.S.C. §§ 120, 365 to the previously filed Japanese Patent Application No. JP2006-197426 entitled, “Magnetic Recording System, Magnetic Recording Method, and Magnetic Recording Program” with a priority date of Jul. 19, 2006, which is incorporated by reference herein.BACKGROUND OF THE INVENTION[0002]1. Technical Field[0003]The present invention relates to magnetic recording systems in general, and more particularly, to a method and apparatus for recording data on a magnetic recording medium.[0004]2. Description of Related Art[0005]Hard disk drives are magnetic recording systems used for storage of information. Information is typically recorded on concentric tracks located on either side of one or more magnetic recording disks. The disk is rotatably supported by a spindle motor. Writing and reading of information to and from a track are performed by a recording / reproducing head pro...

AI Technical Summary

Benefits of technology

[0008]In order to prevent the adjacent track erase resulting from ATI, one prior art method provides that the number of times of data recording in at least one sector of a first track of a hard disk drive is accumulated, and it is determined whether or not the accumulated number of times exceeds a predetermined number of times. If the accumulated number of times exceeds the predetermined number of times, data recorded on tracks adjacent to the track to which the sector concerned belongs is re-recorded. Since a track is adjacent to tracks on both sides thereof, it is affected by the tracks on both sides. However, if data on the track is re-recorded according to the number of times of data recording on an adjacent track on one side thereof, the effect of ATI cannot be accurately determined.

Problems solved by technology

If the distance between the recording / reproducing head and the disk is shortened, when data are recorded on a track, tracks adjacent to the track may be overwritten due to leakage of a magnetic field generated by the recording / reproducing head, resulting in erasing the data recorded on the adjacent tracks.

However, if data on the track is re-recorded according to the number of times of data recording on an adjacent track on one side thereof, the effect of ATI cannot be accurately determined.

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